WebSphere Application Server V8.5 now includes a Liberty Profile is that optimizes developer productivity and web application deployment with the new Liberty Profile option, an ultra lightweight, fast starting, highly composable application server profile. The Liberty profile can be downloaded separately or with WAS for Developers.
IBM WebSphere Application Server for Developers is a no-charge WebSphere Application Server development runtime for projects that don't warrant the expense of a priced and supported runtime on the developer desktop. The development time runtime environment allows developers to test their applications on their desktop before moving the application into a production runtime environment.
Eclipse Marketplace Client (MPC) is a rich client interface for browsing and installing the Eclipse based solutions listed on the Eclipse Marketplace portal. It is a new feature that allows Eclipse users to discover and install Eclipse solutions directly into their Eclipse installation.